package cn.tedu.v6;

import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class Client {
    private static final Integer PORT = 2333;
    private static final String HOST="172.20.18.253";
    private Socket socket;
    private BufferedReader br;
    private PrintWriter pw;
    private String ip;

    public Client() {
        try {
            socket = new Socket(HOST, PORT);
            br = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF8"));
            pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8")), true);
        } catch (UnknownHostException e) {
            System.out.println("IP传入错误");
        } catch (IOException e) {
            System.out.println("客户端链接服务器端：IO流操作出现错误，或者服务器端未启动");
        }
    }

    public static void main(String[] args) {
        new Client().start();
    }
    public void start() {
        try {
            System.out.println("欢迎使用mxy的聊天室");
            Scanner input = new Scanner(System.in);
            String serverMessage = br.readLine();
            System.out.println(serverMessage);
            String username = input.nextLine();
            pw.println(username);
            serverMessage = br.readLine();
            System.out.println(serverMessage);
            String password = input.nextLine();
            pw.println(password);

            serverMessage = br.readLine();
            if (serverMessage.startsWith("登录成功")){
                System.out.println("登录成功，开始聊天");
                chat();}
        } catch (NullPointerException e) {
            System.out.println("IP传入错误导致链接失败或者端口号错误");
        } catch (IOException e) {
            System.out.println("服务器端断开连接");
        } finally {
            Close();
        }
        }

    //封装一个针对聊天功能：读写 chat()
    private void chat() {
        new Thread(() -> {
            try {
                String message;
                while ((message = br.readLine()) != null) {
                    System.out.println("这是服务器端说的： " + message);
                    System.out.println("请客户端输入：");

                    if (message.equalsIgnoreCase("exit")) {  //关写
                        System.out.println("客户端已退出聊天");
                        //Close();
                        break;
                    }
                }
            } catch (IOException e) {
                System.out.println("服务器端读入失败了");
            }
        }).start();
        Scanner input = new Scanner(System.in);
        while (true) {
            System.out.println("请客户端输入");
            String line = input.nextLine();
            pw.println("客户端说：" + line);
            if (line.equalsIgnoreCase("exit")) {
                System.out.println("客户端已退出聊天");
                System.exit(0);
                break;//跳出循环
                //System.exit();程序结束--线程死亡
            }
        }
    }
    //封装一个针对关闭的功能：Close()
    private void Close() {
        if (br != null)
            try {
                br.close();
            } catch (IOException e) {
                System.out.println("客户端通讯关闭失败");
            }
        if (pw != null)
            pw.close();
        if (socket != null && !socket.isClosed()) {
            try {socket.close();
            } catch (IOException e) {
                System.out.println("客户端通讯关闭失败了");
            }
        }
    }
}

